"Man acts as though he were the shaper and master of language, while in fact language remains the master of man." -- Heidegger
Before language there was still swearing
I don't know how much to trust a linguistics site unfamiliar with "interjection" (no "Schoolhouse Rock" in England, I'm afraid). Still, "infixes" was new to me. Are swear words really the only ones that get infixed?